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Diffstat (limited to 'platform/linuxbsd/gl_manager_x11.cpp')
| -rw-r--r-- | platform/linuxbsd/gl_manager_x11.cpp | 378 |
1 files changed, 378 insertions, 0 deletions
diff --git a/platform/linuxbsd/gl_manager_x11.cpp b/platform/linuxbsd/gl_manager_x11.cpp new file mode 100644 index 0000000000..e3d12dcb01 --- /dev/null +++ b/platform/linuxbsd/gl_manager_x11.cpp @@ -0,0 +1,378 @@ +/*************************************************************************/ +/* gl_manager_x11.cpp */ +/*************************************************************************/ +/* This file is part of: */ +/* GODOT ENGINE */ +/* https://godotengine.org */ +/*************************************************************************/ +/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */ +/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md). */ +/* */ +/* Permission is hereby granted, free of charge, to any person obtaining */ +/* a copy of this software and associated documentation files (the */ +/* "Software"), to deal in the Software without restriction, including */ +/* without limitation the rights to use, copy, modify, merge, publish, */ +/* distribute, sublicense, and/or sell copies of the Software, and to */ +/* permit persons to whom the Software is furnished to do so, subject to */ +/* the following conditions: */ +/* */ +/* The above copyright notice and this permission notice shall be */ +/* included in all copies or substantial portions of the Software. */ +/* */ +/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */ +/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */ +/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/ +/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */ +/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */ +/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */ +/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ +/*************************************************************************/ + +#include "gl_manager_x11.h" + +#ifdef X11_ENABLED +#if defined(GLES_X11_ENABLED) + +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> + +#define GLX_GLXEXT_PROTOTYPES +#include <GL/glx.h> +#include <GL/glxext.h> + +#define GLX_CONTEXT_MAJOR_VERSION_ARB 0x2091 +#define GLX_CONTEXT_MINOR_VERSION_ARB 0x2092 + +typedef GLXContext (*GLXCREATECONTEXTATTRIBSARBPROC)(Display *, GLXFBConfig, GLXContext, Bool, const int *); + +struct GLManager_X11_Private { + ::GLXContext glx_context; +}; + +GLManager_X11::GLDisplay::~GLDisplay() { + if (context) { + //release_current(); + glXDestroyContext(x11_display, context->glx_context); + memdelete(context); + context = nullptr; + } +} + +static bool ctxErrorOccurred = false; +static int ctxErrorHandler(Display *dpy, XErrorEvent *ev) { + ctxErrorOccurred = true; + return 0; +} + +int GLManager_X11::_find_or_create_display(Display *p_x11_display) { + for (unsigned int n = 0; n < _displays.size(); n++) { + const GLDisplay &d = _displays[n]; + if (d.x11_display == p_x11_display) + return n; + } + + // create + GLDisplay d_temp; + d_temp.x11_display = p_x11_display; + _displays.push_back(d_temp); + int new_display_id = _displays.size() - 1; + + // create context + GLDisplay &d = _displays[new_display_id]; + + d.context = memnew(GLManager_X11_Private); + ; + d.context->glx_context = 0; + + //Error err = _create_context(d); + _create_context(d); + return new_display_id; +} + +Error GLManager_X11::_create_context(GLDisplay &gl_display) { + // some aliases + ::Display *x11_display = gl_display.x11_display; + + //const char *extensions = glXQueryExtensionsString(x11_display, DefaultScreen(x11_display)); + + GLXCREATECONTEXTATTRIBSARBPROC glXCreateContextAttribsARB = (GLXCREATECONTEXTATTRIBSARBPROC)glXGetProcAddress((const GLubyte *)"glXCreateContextAttribsARB"); + + ERR_FAIL_COND_V(!glXCreateContextAttribsARB, ERR_UNCONFIGURED); + + static int visual_attribs[] = { + GLX_RENDER_TYPE, GLX_RGBA_BIT, + GLX_DRAWABLE_TYPE, GLX_WINDOW_BIT, + GLX_DOUBLEBUFFER, true, + GLX_RED_SIZE, 1, + GLX_GREEN_SIZE, 1, + GLX_BLUE_SIZE, 1, + GLX_DEPTH_SIZE, 24, + None + }; + + static int visual_attribs_layered[] = { + GLX_RENDER_TYPE, GLX_RGBA_BIT, + GLX_DRAWABLE_TYPE, GLX_WINDOW_BIT, + GLX_DOUBLEBUFFER, true, + GLX_RED_SIZE, 8, + GLX_GREEN_SIZE, 8, + GLX_BLUE_SIZE, 8, + GLX_ALPHA_SIZE, 8, + GLX_DEPTH_SIZE, 24, + None + }; + + int fbcount; + GLXFBConfig fbconfig = 0; + XVisualInfo *vi = nullptr; + + gl_display.x_swa.event_mask = StructureNotifyMask; + gl_display.x_swa.border_pixel = 0; + gl_display.x_valuemask = CWBorderPixel | CWColormap | CWEventMask; + + if (OS::get_singleton()->is_layered_allowed()) { + GLXFBConfig *fbc = glXChooseFBConfig(x11_display, DefaultScreen(x11_display), visual_attribs_layered, &fbcount); + ERR_FAIL_COND_V(!fbc, ERR_UNCONFIGURED); + + for (int i = 0; i < fbcount; i++) { + vi = (XVisualInfo *)glXGetVisualFromFBConfig(x11_display, fbc[i]); + if (!vi) + continue; + + XRenderPictFormat *pict_format = XRenderFindVisualFormat(x11_display, vi->visual); + if (!pict_format) { + XFree(vi); + vi = nullptr; + continue; + } + + fbconfig = fbc[i]; + if (pict_format->direct.alphaMask > 0) { + break; + } + } + XFree(fbc); + + ERR_FAIL_COND_V(!fbconfig, ERR_UNCONFIGURED); + + gl_display.x_swa.background_pixmap = None; + gl_display.x_swa.background_pixel = 0; + gl_display.x_swa.border_pixmap = None; + gl_display.x_valuemask |= CWBackPixel; + + } else { + GLXFBConfig *fbc = glXChooseFBConfig(x11_display, DefaultScreen(x11_display), visual_attribs, &fbcount); + ERR_FAIL_COND_V(!fbc, ERR_UNCONFIGURED); + + vi = glXGetVisualFromFBConfig(x11_display, fbc[0]); + + fbconfig = fbc[0]; + XFree(fbc); + } + + int (*oldHandler)(Display *, XErrorEvent *) = XSetErrorHandler(&ctxErrorHandler); + + switch (context_type) { + case GLES_2_0_COMPATIBLE: { + gl_display.context->glx_context = glXCreateNewContext(gl_display.x11_display, fbconfig, GLX_RGBA_TYPE, 0, true); + ERR_FAIL_COND_V(!gl_display.context->glx_context, ERR_UNCONFIGURED); + } break; + } + + gl_display.x_swa.colormap = XCreateColormap(x11_display, RootWindow(x11_display, vi->screen), vi->visual, AllocNone); + + XSync(x11_display, False); + XSetErrorHandler(oldHandler); + + // make our own copy of the vi data + // for later creating windows using this display + if (vi) { + gl_display.x_vi = *vi; + } + + XFree(vi); + + return OK; +} + +Error GLManager_X11::window_create(DisplayServer::WindowID p_window_id, ::Window p_window, Display *p_display, int p_width, int p_height) { + print_line("window_create window id " + itos(p_window_id)); + + // make sure vector is big enough... + // we can mirror the external vector, it is simpler + // to keep the IDs identical for fast lookup + if (p_window_id >= (int)_windows.size()) { + _windows.resize(p_window_id + 1); + } + + GLWindow &win = _windows[p_window_id]; + win.in_use = true; + win.window_id = p_window_id; + win.width = p_width; + win.height = p_height; + win.x11_window = p_window; + win.gldisplay_id = _find_or_create_display(p_display); + + // the display could be invalid .. check NYI + GLDisplay &gl_display = _displays[win.gldisplay_id]; + //const XVisualInfo &vi = gl_display.x_vi; + //XSetWindowAttributes &swa = gl_display.x_swa; + ::Display *x11_display = gl_display.x11_display; + ::Window &x11_window = win.x11_window; + + if (!glXMakeCurrent(x11_display, x11_window, gl_display.context->glx_context)) { + ERR_PRINT("glXMakeCurrent failed"); + } + + _internal_set_current_window(&win); + + return OK; +} + +void GLManager_X11::_internal_set_current_window(GLWindow *p_win) { + _current_window = p_win; + + // quick access to x info + _x_windisp.x11_window = _current_window->x11_window; + const GLDisplay &disp = get_current_display(); + _x_windisp.x11_display = disp.x11_display; +} + +void GLManager_X11::window_resize(DisplayServer::WindowID p_window_id, int p_width, int p_height) { + get_window(p_window_id).width = p_width; + get_window(p_window_id).height = p_height; +} + +void GLManager_X11::window_destroy(DisplayServer::WindowID p_window_id) { + GLWindow &win = get_window(p_window_id); + win.in_use = false; + + if (_current_window == &win) { + _current_window = nullptr; + _x_windisp.x11_display = nullptr; + _x_windisp.x11_window = -1; + } +} + +void GLManager_X11::release_current() { + if (!_current_window) + return; + glXMakeCurrent(_x_windisp.x11_display, None, nullptr); +} + +void GLManager_X11::window_make_current(DisplayServer::WindowID p_window_id) { + if (p_window_id == -1) + return; + + GLWindow &win = _windows[p_window_id]; + if (!win.in_use) + return; + + // noop + if (&win == _current_window) + return; + + const GLDisplay &disp = get_display(win.gldisplay_id); + + glXMakeCurrent(disp.x11_display, win.x11_window, disp.context->glx_context); + + _internal_set_current_window(&win); +} + +void GLManager_X11::make_current() { + if (!_current_window) + return; + if (!_current_window->in_use) { + WARN_PRINT("current window not in use!"); + return; + } + const GLDisplay &disp = get_current_display(); + glXMakeCurrent(_x_windisp.x11_display, _x_windisp.x11_window, disp.context->glx_context); +} + +void GLManager_X11::swap_buffers() { + // NO NEED TO CALL SWAP BUFFERS for each window... + // see https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glXSwapBuffers.xml + + if (!_current_window) + return; + if (!_current_window->in_use) { + WARN_PRINT("current window not in use!"); + return; + } + + // print_line("\tswap_buffers"); + + // only for debugging without drawing anything + // glClearColor(Math::randf(), 0, 1, 1); + //glClear(GL_COLOR_BUFFER_BIT); + + //const GLDisplay &disp = get_current_display(); + glXSwapBuffers(_x_windisp.x11_display, _x_windisp.x11_window); +} + +Error GLManager_X11::initialize() { + return OK; +} + +void GLManager_X11::set_use_vsync(bool p_use) { + static bool setup = false; + static PFNGLXSWAPINTERVALEXTPROC glXSwapIntervalEXT = nullptr; + static PFNGLXSWAPINTERVALSGIPROC glXSwapIntervalMESA = nullptr; + static PFNGLXSWAPINTERVALSGIPROC glXSwapIntervalSGI = nullptr; + + // force vsync in the editor for now, as a safety measure + bool is_editor = Engine::get_singleton()->is_editor_hint(); + if (is_editor) { + p_use = true; + } + + // we need an active window to get a display to set the vsync + if (!_current_window) + return; + const GLDisplay &disp = get_current_display(); + + if (!setup) { + setup = true; + String extensions = glXQueryExtensionsString(disp.x11_display, DefaultScreen(disp.x11_display)); + if (extensions.find("GLX_EXT_swap_control") != -1) + glXSwapIntervalEXT = (PFNGLXSWAPINTERVALEXTPROC)glXGetProcAddressARB((const GLubyte *)"glXSwapIntervalEXT"); + if (extensions.find("GLX_MESA_swap_control") != -1) + glXSwapIntervalMESA = (PFNGLXSWAPINTERVALSGIPROC)glXGetProcAddressARB((const GLubyte *)"glXSwapIntervalMESA"); + if (extensions.find("GLX_SGI_swap_control") != -1) + glXSwapIntervalSGI = (PFNGLXSWAPINTERVALSGIPROC)glXGetProcAddressARB((const GLubyte *)"glXSwapIntervalSGI"); + } + int val = p_use ? 1 : 0; + if (glXSwapIntervalMESA) { + glXSwapIntervalMESA(val); + } else if (glXSwapIntervalSGI) { + glXSwapIntervalSGI(val); + } else if (glXSwapIntervalEXT) { + GLXDrawable drawable = glXGetCurrentDrawable(); + glXSwapIntervalEXT(disp.x11_display, drawable, val); + } else + return; + use_vsync = p_use; +} + +bool GLManager_X11::is_using_vsync() const { + return use_vsync; +} + +GLManager_X11::GLManager_X11(const Vector2i &p_size, ContextType p_context_type) { + context_type = p_context_type; + + double_buffer = false; + direct_render = false; + glx_minor = glx_major = 0; + use_vsync = false; + _current_window = nullptr; +} + +GLManager_X11::~GLManager_X11() { + release_current(); +} + +#endif +#endif |